Thank you. :) I have a divider, I'll probably put that up between the two if I start to notice aggression between them.

Is it okay to only feed them brine shrimp for now? I was considering ordering a microworm culture, but I'd rather not deal with them if I'm okay only feeding bbs for now. I'll probably start trying to get them to bite on the Hikari first bites soon, once they start to associate me with feeding.

Dividers don't work unless they are glued in. I have had very bad experiences with dividers if that helps. I have several in storage if you want them. Eventually, bettas find the weak spot on the divider or that spot you thought they were too big to fit through and........

Hmm. The one I used worked pretty well to keep the male and female separated for a day or two while they flirted. I kind of jammed it in there and it held pretty well, but I'll keep a close eye on them. Won't be a permanent setup, if I go that way at all.

Regarding the possible swim bladder issue, I don't think he has one. He just likes to hang out at the bottom. He was swimming through some plants earlier, and holding his place easily.